The BubbleGen is a revolutionary way to circulate your and oxygenate your nutrient solution – it removes the need for air stones and circulation pumps. Just attach to a water pump and you're good to go! It features a twin jet hydroponic bubble generator with integral silencer which efficiently and quietly oxygenates and circulates a nutrient tank. Using atmospheric pressure to pull oxygen-rich air through the input port, it mixes with the nutrients passing through the body of the unit, ejecting an energetic circulating stream of nutrient and bubbles. compressor air pump. - Submersible and quiet running - Oxygenates water efficiently - Additional tank circulation jets not required - No air stones required - Can operate with 1000 – 4000 LPH pumps - 4mm inletoWorks on vacuum rather than positive pressure so no addition heat generated - Supplied with 3 suction cups for fitting - Quick and easy installation